/* ====================== Brand / Logo ====================== */
.navbar-brand .logo-text{
  display:inline-block;
  padding:10px 15px;
  background-color:#007bff;
  color:#fff;
  font-weight:bold;
  font-size:1.5rem;
  border-radius:1px;
}

/* ====================== Navbar Base ====================== */
#siteNav.navbar{
  position:relative;
  z-index:1060;
  background:#fff;
  box-shadow:0 2px 10px rgba(0,0,0,.1);
  padding:1rem 0;
  transition:.3s;
}
#siteNav .navbar-brand{ font-weight:700; font-size:1.5rem; color:#333; }

/* nav links */
#siteNav .navbar-nav .nav-link{
  color:#333; font-weight:500;
  margin:0 .5rem; padding:.5rem 1rem;
  border-radius:6px; transition:.3s;
}
#siteNav .navbar-nav .nav-link:hover{
  color:#0d6efd; background:rgba(13,110,253,.1);
  transform:translateY(-1px);
}
#siteNav .navbar-nav .nav-link.active{
  color:#0d6efd; background:rgba(13,110,253,.1);
}

/* ====================== Split Toggle（父级 + 小三角）====================== */
#siteNav .navbar-nav .nav-item.dropdown{
  position:relative;
  display:flex; align-items:center;
  gap:.2rem;
}
#siteNav .navbar-nav .nav-item.dropdown > .nav-link{
  white-space:nowrap;
  margin-right:0;
}
#siteNav .navbar-nav .dropdown-toggle-split{
  display:inline-flex; align-items:center; justify-content:center;
  padding:0 .35rem; margin-left:.125rem;
  line-height:1; flex:0 0 auto; white-space:nowrap;
  border:0; background:transparent;
}
.navbar .dropdown-toggle-split{ padding-left:.25rem; padding-right:.25rem; }
@media (max-width: 991.98px){
  #siteNav .navbar-nav{
    align-items: center;   /* 居中对齐 */
  }
  #siteNav .navbar-nav .nav-link{
    text-align: center;    /* 链接文字居中 */
    width: 100%;           /* 链接撑满，方便点 */
  }
}
/* Desktop */
@media (min-width:992px){
  #siteNav .navbar-nav{ flex-wrap:nowrap; }
  #siteNav .navbar-nav .nav-item.dropdown{ gap:.1rem; }
  #siteNav .navbar-nav .nav-item.dropdown > .nav-link{ padding-right:.25rem; }
  #siteNav .navbar-nav .dropdown-toggle-split{ margin-left:0; padding:0 .25rem; }
}

/* Mobile */
@media (max-width:991.98px){
  #siteNav.navbar{ padding:.5rem 0; }
  #siteNav .navbar-nav .nav-link{ margin:.25rem 0; text-align:center; }
  #siteNav .navbar-nav .nav-item.dropdown{ gap:.4rem; }
  #siteNav .navbar-nav .nav-item.dropdown > .nav-link{ padding-right:.5rem; }
  #siteNav .navbar-nav .dropdown-toggle-split{ padding:0 .6rem; margin-left:.25rem; }
}

/* ====================== Dropdown ====================== */
#siteNav .dropdown{ position:relative; }
#siteNav .dropdown-toggle::after{ transition:transform .3s; }
#siteNav .dropdown:hover .dropdown-toggle::after{ transform:rotate(180deg); }

#siteNav .navbar-nav .nav-item.dropdown > .dropdown-menu{
  position:absolute; top:100%; left:0;
  margin:0;
  z-index:1060;
  background:#fff;
  border:1px solid rgba(0,0,0,.1);
  box-shadow:0 5px 15px rgba(0,0,0,.1);
  border-radius:8px;
  transform-origin:top center;
  animation:slideDown .3s ease;
}
/* hover bridge */
#siteNav .navbar-nav .nav-item.dropdown > .dropdown-menu::before{
  content:""; position:absolute; left:0; right:0; top:-8px; height:8px;
}

#siteNav .dropdown-item{
  padding:.75rem 1.25rem; transition:.2s;
  border-radius:4px; margin:.125rem .5rem;
}
#siteNav .dropdown-item:hover{ background:rgba(13,110,253,.1); color:#0d6efd; }

@keyframes slideDown{ from{opacity:0; transform:translateY(-10px)} to{opacity:1; transform:translateY(0)} }

/* PC hover show */
@media (min-width:992px){
  #siteNav .dropdown:hover > .dropdown-menu,
  #siteNav .nav-item.dropdown > .dropdown-menu:hover{ display:block; }
  #siteNav .navbar-nav{ margin:0 auto; }
  #siteNav .navbar-collapse{ justify-content:center; }
}

/* ====================== Form / Button ====================== */
#siteNav .form-control{ border:1px solid #e0e0e0; border-radius:6px; padding:.5rem 1rem; transition:.3s; width:200px; }
#siteNav .form-control:focus{ border-color:#0d6efd; box-shadow:0 0 0 .2rem rgba(13,110,253,.25); }
#siteNav .btn-outline-primary{ border:1px solid #0d6efd; color:#0d6efd; border-radius:6px; padding:.5rem 1rem; transition:.3s; }
#siteNav .btn-outline-primary:hover{ background:#0d6efd; color:#fff; transform:translateY(-1px); }

/* ====================== Animation ====================== */
#siteNav .navbar-nav .nav-item{ animation:fadeInUp .4s ease forwards; opacity:0; transform:translateY(10px) }
#siteNav .navbar-nav .nav-item:nth-child(1){animation-delay:.1s}
#siteNav .navbar-nav .nav-item:nth-child(2){animation-delay:.2s}
#siteNav .navbar-nav .nav-item:nth-child(3){animation-delay:.3s}
#siteNav .navbar-nav .nav-item:nth-child(4){animation-delay:.4s}
@keyframes fadeInUp{ to{ opacity:1; transform:translateY(0) } }

/* ====================== Search Section ====================== */
.site-search{ background:var(--bs-body-tertiary); padding:2rem 0; border-top:1px solid #e0e0e0; border-bottom:1px solid #e0e0e0; }
.site-search .search-pill{ max-width:820px; margin:0 auto; border-radius:999px; background:#fff; box-shadow:0 .25rem .75rem rgba(0,0,0,.06); padding:.625rem .5rem; display:flex; align-items:center; gap:.5rem; }
.site-search .search-icon{ width:2rem; height:2rem; color:#6c757d; display:inline-flex; align-items:center; justify-content:center; }
.site-search .search-input{ height:2.75rem; border:0; flex:1 1 auto; box-shadow:none; padding-left:.25rem; }
.site-search .search-input:focus{ box-shadow:none; outline:none; }
.site-search .search-pill:focus-within{ outline:none; box-shadow:0 0 0 .25rem rgba(13,110,253,.12); border:1px solid rgba(13,110,253,.35); }
.site-search .search-btn{ height:2.25rem; border-radius:999px; padding:0 1rem; }
.site-search, .site-search .container{ overflow:visible; }

@media (max-width:767.98px){
  .site-search .search-pill{ background:transparent; box-shadow:none; border:0; padding:0; gap:0; border-radius:0; flex-direction:column; }
  .site-search .search-icon{ display:none !important; }
  .site-search .search-input{ display:block; width:100%; height:48px; padding:0 14px; border:1px solid #d0d7de; border-radius:12px; background:#f7f9fc; font-size:16px; box-shadow:none; margin-bottom:.5rem; }
  .site-search .search-input::placeholder{ color:#98a2b3; opacity:1; }
  .site-search .search-input:focus{ outline:none; background:#fff; border-color:#0d6efd; box-shadow:0 0 0 3px rgba(13,110,253,.15); }
  .site-search .search-btn{ width:100%; height:48px; border-radius:12px; }
  .site-search .search-pill:focus-within{ box-shadow:none; border:0; }
}

/* ====================== Main / Sidebar / Cards ====================== */
.main-content{ background:#f8f9fa; padding:2rem 0; }

.sidebar{ background:#fff; border-radius:8px; box-shadow:0 2px 10px rgba(0,0,0,.1); padding:1rem; margin-bottom:2rem; border:1px solid #e0e0e0; }
.sidebar h5{ margin-top:0; margin-bottom:1rem; color:#333; font-weight:600; }
.category-list{ list-style:none; padding:0; margin:0; }
.category-item{ padding:.5rem 0; border-bottom:1px solid #eee; transition:.2s; }
.category-item:hover{ background:#f8f9fa; cursor:pointer; }
.category-item.active{ background:#0d6efd; color:#fff; }
.category-item.active a{ color:#fff; }
.category-count{ display:inline-block; width:24px; height:24px; line-height:24px; text-align:center; background:#e9ecef; border-radius:50%; font-size:.75rem; margin-left:.5rem; }

.content-header{ margin-bottom:.75rem; }
.content-header h1{ margin-bottom:.35rem; }
.breadcrumb{ margin-bottom:.25rem; font-size:.875rem; }

.col-md-9.col-lg-9 > .row{ display:grid; grid-template-columns:1fr; gap:12px; margin:0; }
@media (min-width:768px){ .col-md-9.col-lg-9 > .row{ grid-template-columns:repeat(2,1fr); } }
@media (min-width:992px){ .col-md-9.col-lg-9 > .row{ grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; } }
.col-md-9.col-lg-9 > .row > [class^="col-"], .col-md-9.col-lg-9 > .row > [class*=" col-"]{ padding:0; width:auto; }

.card{ border:1px solid #e0e0e0; border-radius:8px; overflow:hidden; transition:.3s; box-shadow:0 2px 10px rgba(0,0,0,.1); height:100%; margin:0; display:flex; }
.card:hover{ transform:translateY(-2px); box-shadow:0 5px 15px rgba(0,0,0,.15); }
.card-body{ padding:.625rem .75rem; display:flex; flex-direction:column; }
.col-md-9.col-lg-9 .card .d-flex.align-items-center{ align-items:flex-start !important; }
.col-md-9.col-lg-9 .card .avatar{ margin-right:10px; }
.card .d-flex .flex-grow-1{ min-width:0; }
.card-title{ margin-bottom:.25rem; white-space:normal; overflow:visible; text-overflow:clip; overflow-wrap:anywhere; }
.card-subtitle{ margin:0 0 .5rem; font-size:.875rem; color:#6c757d; }
.card-text{ margin:0 0 .875rem; font-size:.875rem; color:#6c757d; line-height:1.5; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.card-tags{ display:flex; gap:.5rem; flex-wrap:wrap; margin-top:auto; }
.tag{ font-size:.75rem; padding:.25rem .5rem; background:#e9ecef; border-radius:4px; color:#6c757d; }
.rating{ flex:0 0 auto; white-space:nowrap; margin-left:8px; }
.rating .bi-star-fill{ color:#f5c518; margin-right:4px; }
.avatar{ width:40px; height:40px; line-height:40px; border-radius:50%; flex:0 0 40px; text-align:center; color:#fff; }
.avatar.s{ background:#ff9800; } .avatar.g{ background:#4caf50; } .avatar.b{ background:#2196f3; } .avatar.r{ background:#9c27b0; } .avatar.h{ background:#f44336; }

/* ====================== Pagination ====================== */
.pagination{ justify-content:center; margin-top:1.25rem; }
.page-item.active .page-link{ background:#0d6efd; border-color:#0d6efd; color:#fff; }
.page-item .page-link{ border-color:#e0e0e0; transition:.2s; }
.page-item .page-link:hover{ background:#f8f9fa; border-color:#0d6efd; }

/* responsive */
@media (max-width:991.98px){ .sidebar{ margin-bottom:1rem; } .main-content{ padding:1.25rem 0; } }
@media (max-width:767.98px){ .sidebar{ width:100%; margin-bottom:1rem; } .content-header h1{ font-size:1.5rem; } .col-md-9.col-lg-9 > .row{ grid-template-columns:1fr; gap:12px; } }

/* ====================== Footer ====================== */
footer{ background:#343a40; color:#fff; margin-top:2rem; }
footer a{ color:rgba(255,255,255,.8); text-decoration:none; }
footer a:hover{ color:#fff; text-decoration:underline; }

/* ====================== Utilities ====================== */
.text-muted{ color:#6c757d !important; }
.bg-light{ background:#f8f9fa !important; }
.border-top{ border-top:1px solid #dee2e6 !important; }
.border-bottom{ border-bottom:1px solid #dee2e6 !important; }
.py-5{ padding-top:3rem !important; padding-bottom:3rem !important; }
.py-3{ padding-top:1rem !important; padding-bottom:1rem !important; }